介绍了高盐废水零排放的常用处理工艺，并针对某石化企业实际的设计案例，研究针对乙烯废碱液节能、环保的零排放处理工艺，通过相图和溶解度曲线研究，提出了采用冷冻结晶作为核心工艺对乙烯废碱液进行零排放的工艺流程，并总结了该处理工艺的实用性和先进性。

This paper introduces common treatment processes for zero discharge of high salinity wastewater.In view of the actual design case of a certain petrochemical enterprise, an energy-saving and environmentally friendly zero discharge treatment process for spent alkali solution from ethylene cracking is studied.Through studying phase diagrams and solubility curves, a zero discharge process with freezing crystallization as core technology is proposed for treatment of spent alkali solution from ethylene cracking, and its practicability and progressiveness are summarized.